SPT Sampler Auto Trip Hammer 63.5 kg for SPT hammer Soil Sampling Projects

SPT hammer
 

SPT Auto Trip Hammer 63.5 kg for Soil Sampling

SPT hammer of 63.5 kg


SPT hammer of 63.5 kg drive several piles with a small diameter (max 80mm) into soil and came across the SPT auto trip hammer

SPT Auto Trip Hammer 63.5 kg for SPT hammer Soil Sampling Projects 


 

Automatic Trip Hammer Completely SPT Sampler 2 inch Soil Sampling



2 inch Automatic Trip Hammer SPT Sampler kit  

Automatic Trip Hammer SPT Sampler 2 inch Soil Sampling  
 

Automatic Trip Hammer Completely SPT Sampler 2 inch Soil Sampling   
 

Driving Ground Rod SPT Sampler Standard Penetration Test Equipment  

SPT Drive Rods are manufactured to connect with the SPT Split Tube Sampler and comply with the BS 1377: Part 9: 1990.   
 

The rod O.D. is 54 mm with solid 1-1/2" B.S. Whitworth male and female tool joints on each end. The tool joints are friction welding with the Rods and has a pair of spanner flats to facilitate handling.   

The rod weighs only 8.8 kg per meter but is both stronger and stiffer. It has four kinds of standard lengths, like 3.0m, 1.5m, 1.0m and 0.75m.  
 

The Automatic Trip Hammer comprises following parts:  
 

a) A weight made of steel and provided with an axial hole with a diameter which is 3 mm to 4 mm larger than that of the guide rod. It is of 63.5 kg.  

b) A pick-up and release mechanism to ensure that the weight has a free fall of 760 mm and shall not influence the acceleration and deceleration of the weight or the rods.  

c) An inner guide shaft to permit the weight to drop with minimal resistance, and to ensure the weight strikes the anvil squarely.  

d) An anvil made of steel with an integral threaded portion to connect squarely and rigidly on to the top of the uppermost extension rod.  

 

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The Standard Penetration Test (SPT) and Cone Penetrometer Test (CPT) have become industry standards for subsurface geotechnical investigations using small diameter (<8-in. [20-cm]) borings and soundings. Both procedures have evolved over a period of 100 and 70 years, respectively, and have been adopted as ASTM standards. Each procedure has certain advantages over the other, but both can elicit incorrect data under particular subsurface conditions that are often overlooked, depending on the experience of field personnel operating or logging the tests. This paper seeks to explain the operative assumptions employed in both procedures, highlight the various corrections that are commonly employed, and warn the reader of common errors in interpretation.

The article concludes by stating that, under most conditions, the joint employment of SPT and CPT together has the greatest potential for characterizing sites correctly.

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ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED

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